GCP-Terraform-Node.jsApp

Building a stateful web app using GCP architecture to deploy it in the GKE cluster using Terraform as infrastructure as code (IaC)

Overview

• Develop and use your own Terraform modules to build the required infrastructure on GCP:

  • a. IAM: 2 service accounts - N roles.
  • b. Network: 1 VPC – 2 subnets – N firewall rules – 1 NAT.
  • c. Compute: 1 private VM – 1 GKE standard cluster across 3 zones.
  • d. Storage: Artifact Registry repository to store the images.

• Deploy the MongoDB replicaset across the 3 zones

• Dockerize and Deploy the Node.js web app connected to the 3 DB replicas.

• Expose the web app using ingress/load balancer.

Architecture

Prerequisites

• GCP Account
• Terraform
• docker
• kubectl

Steps

• Build application image by docker file and push to artifact registry

• Initialize infra using Terraform

  terraform init
  terraform plan
  terraform apply --auto-approve

  • after applying it should return that your infra has been completed

• After creating the GCP architecture we have to ssh to private-vm through IAP

  gcloud compute ssh [vm-name] --tunnel-through-iap --zone=[zone-name] --project=[project-id]

• Once you connect to your private VM, you can access the GKE Cluster

  gcloud container clusters get-credentials [cluster-name] --zone [zone-name] --project [project-id]

  • Deploy MongoDB (stateful)
  • Deploy Node.js app
  • Deploy LoadBalancer service

Results

• 

  curl EXTERNAL_IP:PORT